Many africans have traditionally used the second method-and may now be using contraception to make birth intervals even longer .
很多非洲人传统上采取第二种方法现在或许也会采取避孕措施使得生育间隔隔得更久。
The arboreal species has one of the longest intervals between births among mammals , typically around eight years .
该树栖物种的生育间隔期是哺乳动物中最长的生育间隔期之一,通常为八年左右。
This phenomenon repeats itself at irregular intervals , with the last two major ice collapses occurring in 2012 and 2008 .
这种现象以不规则的间隔重复产生,终于在2012和2008年使两个主要的冰山倒塌。
The duration you set between intervals can be a bit strange at first , as it 's defined in milliseconds .
一开始你可能会觉得所设置的间隔时长有些奇怪,因为它被定义成毫秒。
Eventually , an equilibrium is reached , and the intervals become fairly regular .
最终,这会达到一种平衡,这样每起袭击事件的间隔就看起来比较有规律了。
The subjects saw 120 unfamiliar faces , each one repeated four times at varying intervals during the fmri scan .
在fmri扫描期间,这些受试者被要求看120张陌生的面孔,每张面孔以不同的间隔重复出现4次。
The intervals between bunches , meanwhile , were longer , allowing for a more precise measurement of speed .
同时各串之间的时间间隔也拉长了,这就能更为精确地测量速度。
An important aspect of these models is the concept of staggered prices - which says that most goods prices do not adjust continuously but at discrete intervals .
Further rounds are to be staged at two-week intervals , meaning that the detailed count for all 498 people 's assembly seats is not expected until mid-january .
The geophysicists went on to conduct a second test in an abandoned copper mine in arizona , using 25 iron plates spaced at various intervals in tunnels up to 45 metres below ground .